Home / 20,666.94-31,000.40-7,519.42

Finding the Fourth Proportional to 20,666.94, 31,000.40 and 7,519.42

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Solution

The fourth proportional to 20,666.94, 31,000.40 and 7,519.42 is: 11,279.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.94 : 31,000.40 = 7,519.42 : x
  2. Step 2: Convert to fraction form
    20,666.94/31,000.40 = 7,519.42/x
  3. Step 3: Cross multiply
    20,666.94x = 31,000.40 × 7,519.42
  4. Step 4: Simplify right side
    20,666.94x = 233,105,027.77
  5. Step 5: Solve for x
    x = 233,105,027.77/20,666.94
  6. Step 6: Final answer
    x = 11,279.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.